10-97460132-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_022362.5(MMS19):c.2570A>C(p.His857Pro) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,461,684 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: MMS19 NM_022362.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.43

Genes affected

MMS19 (HGNC:13824): (MMS19 homolog, cytosolic iron-sulfur assembly component) Enables estrogen receptor binding activity and transcription coactivator activity. Involved in several processes, including iron-sulfur cluster assembly; positive regulation of nucleobase-containing compound metabolic process; and protein maturation by iron-sulfur cluster transfer. Located in cytosol; nucleoplasm; and spindle. Part of CIA complex and MMXD complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.807

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MMS19	NM_022362.5	c.2570A>C	p.His857Pro	missense_variant	26/31	ENST00000438925.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MMS19	ENST00000438925.7	c.2570A>C	p.His857Pro	missense_variant	26/31	1	NM_022362.5	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461684 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 727126

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 23, 2023

The c.2570A>C (p.H857P) alteration is located in exon 26 (coding exon 26) of the MMS19 gene. This alteration results from a A to C substitution at nucleotide position 2570, causing the histidine (H) at amino acid position 857 to be replaced by a proline (P). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.64
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.27
Cadd	Uncertain	25
Dann	Uncertain	0.99
DEOGEN2	Benign	0.11	T;T;.;.
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.53
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Uncertain	0.12	D
MetaRNN	Pathogenic	0.81	D;D;D;D
MetaSVM	Uncertain	-0.21	T
MutationAssessor	Uncertain	2.8	M;M;.;.
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Uncertain	0.71	T
PROVEAN	Pathogenic	-8.1	D;D;D;D
REVEL	Uncertain	0.61
Sift	Pathogenic	0.0	D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		0.79	P;P;D;.
Vest4		0.95
MutPred		0.52		Loss of helix (P = 0.079);Loss of helix (P = 0.079);.;.;
MVP		0.86
MPC		0.64
ClinPred		1.0	D
GERP RS		5.3
Varity_R		0.95
gMVP		0.76

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1251864078; hg19: chr10-99219889;